Window lock



S. .J. HOFF WINDOW .LOCK

Filed M y 16. 1922 i ill-T25 ATTORNEY Patented July 10, 1923.

PATENT orrice.

SIGURD HOFF, OF NEW YORK, N. Y.

' ,wmnow LOCK.

Application filcd May 16, 1922. Serial No. 561,313.

To (ZZZ whom 2'75 concern:

Be itknown that I, Sienna JAHR Horn, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and'useful Improvements in Window Locks, of which the following is a specification. I I

This invention relates to locks, more particularly to window locks, and has for its main object the provision of a lock which will when manipulated securely lock a pair ofslide windows inthe closed position in such a way so that they cannot be opened by a pry bar or similar burglars tool.

Another object is to provide with the de vice a means for jamming the contacting surfaces of the windows to each other so as to prevent their rattling during a heavy wind.

The above and other objects will become apparent in the description below in which characters of reference refer to like-named parts in the drawing.

Referring briefly to the drawing, Figure 1 represents a front elevation of a window in closed position.

Figure 2 is a sectional side elevational view taken onthe line 22 of Figure 1.

Figure 3 is a fragmentary enlarged elevational view of the upper rail of the lower sash showing the means for moving the looking bolt.

Figure 4 is a sectional side elevational View of the same, taken on line 4-4 of Figure 3.

Figure 5 is a fragmentary enlarged elevational view of the lower rail of the upper sash showing the locking slot formed therein.

Figure 6 is a top plan view of the same.

Describing the drawing more in detail, the

numeral 10 indicates the upright members of a window frame which are joined to each other by horizontal members 11, An upper sash 12 and a lower sash 13 are slidably.

mounted within the frame, one adjacent the other. These sashes can be the usual constructionand the locking device interferes with no part of its function or operation.

The lower sash 13 has a longitudinal recess 14 formed in its upper horizontal rail 15 and is provided with a series of gear teeth 16 which run thruout the upper surface of th recess. Said rece s 14 provides pinion hole 18 thru the slot 20, extending somewhat beyond, and hasa relatively large square flanged head 21 formed at its end.

An annular knurled hand knob 22 formed "integral with the pinion 17 extends therefrom and is adapted to rotate latter when turned. The threaded end of locking bolt 19 pro ects from the thumb knob 22 and is firmly secured in place on the pinion by leverage being applied to wing nut 23.

The lower horizontal rail 24 of the upper sash 12has an angular slot 25 open at one end, the bottom of said open end corresponding to the extreme end of travel of the looking bolt 19 in the lower sash. Said slot 25 extends downward changing its course to horizontal and is of such length as to register with slot 20 in the lower sash when both sashes 12 and 13 are in closed position. A sunken channel 26 formed within frame 24 behind the slot 25 receives the square head 21 of the locking bolt when both sashes are closed.

In use, and when securely locking the sashes in closed position, after the upper sash 12 is in its proper position, the lower sash 13 is lowered after the locking bolt 19 is moved to the end of 20 (this position being indicated in Figure 3). As the lower sash is closed while the bolt is in this position, the flanged head 21 thereof will enter channel 26 and complete the vertical length of travel when the sash is completely closed. Loosening the winged nut 23 and rotating the knurled thumb knob 22 will urge or slide the locking bolt 19 to the locking end of the slot 20. During the travel of the locking bolt 19, the flanged head 21 thereof will engage and ride upon the inclined surface 28 of the sunken channel 26. This will draw the adjacent surfaces of the upper and lower sashes toward each other in a sort of jam fit and thus completely seal the window opening and also prevent any rattling which would be bound to occur, during a strong wind, if the sashes were separated. Tightening of the wing nut 23 will obviously secure the locking bolt in the adjusted position and prevent a person from feeding the locking bolt to the releasing end of the slot.

I claim;

1. In combination with a pair of slide sashes, a means for releasably locking bothsashes in the closed position comprising an upper sash with a longitudinal slot therein and provided with an angular exit'slot at one end thereof, said upper sash having a sunken channel registering with the said slots, an inclined surface formed on one side zof the sunkenlchannel andmeans carried within .thechannel forlocking the up- .perand lower sashesto each other when in the closedposition.

2.111 combination with a pair .of .-slide sashes, a means forreleasablylocking-both sashes to each iotherinthe close'd;position .coniprisin-gvan upper sash havingrallong' itudinal slot, and .an exit slot at one endof theilatter, anda sunken channel registering with the said slots,.a.lower sash havingfla longitudinal slot and an open recessfornied therein which register withtheslot in the upper sash, alocking bolt engaging said an exit slottat one-.end of the latter, and a sunken channel registering with the said slots, a lower sash having a longitudinal slot and "an 1 open recess formed therein which register with the slot in the upper sash, rackteethoirone surface of the open-recess, a pinion in said recess and engaging said rack teeth, a knurled thumb knob .Tforme d integral with said pinion, 1a. .square headed locking bolt receiving said pinion revolnbly thereon, saidpinion.whenrotated adapted to rrnove thefbolt along. the. slot-and means for securing said locking bolt in the longitudmal t slots.

In Witness whereof-I aflixmysignature.

.sieunn JAHRi-HO'FR 

